Example usage for com.google.gwt.user.client WindowScrollListener WindowScrollListener

Introduction

In this page you can find the example usage for com.google.gwt.user.client WindowScrollListener WindowScrollListener.

Prototype

WindowScrollListener

Source Link

Usage

From source file:com.google.appinventor.client.RpcStatusPopup.java

License:Open Source License

/**
 * Initializes the LoadingPopup.//from  w ww.j  a v a  2 s .c  o m
 */
public RpcStatusPopup() {
    super(/* autoHide = */ false);
    setStyleName("ode-RpcStatusMessage");
    setWidget(label);

    // Re-center the loading message when the window is resized.
    // TODO(halabelson): Replace the deprecated methods
    Window.addWindowResizeListener(new WindowResizeListener() {
        @Override
        public void onWindowResized(int width, int height) {
            positionPopup(getOffsetWidth());
        }
    });

    // Reposition the message to the top of the screen when the
    // window is scrolled
    // TODO(halabelson): get rid of the flashing on vertical scrolling
    Window.addWindowScrollListener(new WindowScrollListener() {
        @Override
        public void onWindowScrolled(int scrollLeft, int scrollTop) {
            positionPopup(getOffsetWidth());
        }
    });

    // Position the popup before showing it to prevent flashing.
    setPopupPositionAndShow(new PopupPanel.PositionCallback() {
        @Override
        public void setPosition(int offsetWidth, int offsetHeight) {
            positionPopup(offsetWidth);
        }
    });
}

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